arch/parisc/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 source "lib/Kconfig.debug"
   4
   5 config DEBUG_RODATA
   6        bool "Write protect kernel read-only data structures"
   7        depends on DEBUG_KERNEL
   8        help
   9          Mark the kernel read-only data as write-protected in the pagetables,
  10          in order to catch accidental (and incorrect) writes to such const
  11          data. This option may have a slight performance impact because a
  12          portion of the kernel code won't be covered by a TLB anymore.
  13          If in doubt, say "N".
  14
  15 config DEBUG_STRICT_USER_COPY_CHECKS
  16         bool "Strict copy size checks"
  17         depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
  18         ---help---
  19           Enabling this option turns a certain set of sanity checks for user
  20           copy operations into compile time failures.
  21
  22           The copy_from_user() etc checks are there to help test if there
  23           are sufficient security checks on the length argument of
  24           the copy operation, by having gcc prove that the argument is
  25           within bounds.
  26
  27           If unsure, or if you run an older (pre 4.4) gcc, say N.
  28
  29 endmenu